Abstract

Taking advantage of the fact that Raman scattering is a correlation function of the single particle density of states we have employed it to measure the correlation obtained as the electrons from the Cooper pairs. Indeed, the idea is quite simple in principle; Raman scattering reveals the extent or lack of correlations of the scattering excitations.¹ As the electrons undergo pairing at the critical superconducting temperature they correlate and thus scatter coherently. If the correlation length is of the order of a wavelength the scattering adds coherently resulting in a corresponding sudden increase in the Raman scattering intensity at the transition temperature.

© 1994 Optical Society of America